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<div class="returnTop"><p class="pull-right"><a href="#top"><i class="fa fa-arrow-up"></i></a></p></div>

.returnTop{
  position: fixed;
  bottom: 15px;
  right: 20px;
}
.returnTop a{
  color:#c41230;
}

$("a[href='#top']").click(function() {
  $("html, body").animate({ scrollTop: 0 }, "slow");
  return false;
});